H-1B duration after L-2 EAD

[K1121]

Hi,

I came on L-1B in June 2013 & my wife came on L-2 same time. She got L-2 EAD in October 2013 & working since then on & off.
She got H-1B in 2017 & working on H-1B since 1st October 2017.

Question - What will be the duration of her H1-B visa which started from 1st October 2017.
3+3 years
OR
6 years - L-2 time(4 years 3 months) = 1 year 9 months.

Thanks in advance.